The Indian Journal of Dermatology describes Demodex as tiny parasites that commonly live on the human body. According to Women's Health, it's likely you already have mites hanging out on your lashes right now. In other words, they can affect anyone — not just those with eyelash extensions — and they're generally not an issue unless there you have an absolute ton on board.
If you do have extensions, it's vital to clean them on a regular basis to prevent excess mite buildup. It can be intimidating to clean them, though. "Generally, the idea when you have eyelash extensions is that people are afraid to touch them or wash them because they're afraid the eyelash will fall out," Dr. Sarah Malik revealed to ABC 7 News. She suggests a diluted tea tree oil solution to help keep your eyelash mite population in check, and also give your eyes a break from extensions every so often.
But how do you know if you have mites? Women's Health lists symptoms such as red, itchy, and irritated eyes that water more than usual. Whether it's eyelash mites or not, if you are experiencing these symptoms, it's best you see a doctor or dermatologist immediately.